FAN5353 Datasheet, PDF (5/13 Pages) Fairchild Semiconductor – 3MHz, 3A Synchronous Buck Regulator

Typical Characteristics
Unless otherwise specified, VIN = 5V, VOUT = 1.2V, circuit of Figure 1, and components per Table 1.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
1
VIN = 3.3V
VIN = 5V
10
100
1000
I _LOAD Output Current (mA)
10000
Figure 3. Efficiency vs. ILOAD at VOUT = 1.2V
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
1
VIN = 3.3V
VIN = 5V
10
100
1000
I _LOAD Output Current (mA)
10000
Figure 5. Efficiency vs. ILOAD at VOUT = 2.5V
1
0.9
0.8
0.7
0.6
0.5
85°C
0.4
25°C
0.3
‐40°C
0.2
0.1
0
2.7
3.2
3.7
4.2
4.7
5.2
Input Voltage(V)
Figure 7. Shutdown Supply Current vs. VIN, EN to 0V
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
1
VIN = 3.3V
VIN = 5V
10
100
1000
I _LOAD Output Current (mA)
10000
Figure 4. Efficiency vs. ILOAD at VOUT = 1.8V
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
1
VIN = 4.2V
VIN = 5V
10
100
1000
I _LOAD Output Current (mA)
10000
Figure 6. Efficiency vs. ILOAD at VOUT = 3.3V
16
15
14
13
12
85°C
11
25°C
–40°C
10
9
8
2.7
3.2
3.7
4.2
4.7
5.2
VIN Input Voltage (V)
Figure 8. Quiescent Current vs. VIN, No Load
© 2009 Fairchild Semiconductor Corporation
FAN5353 • Rev. 1.0.2
5
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